from easygraphics.turtle import *


def nest_tri(size, level):
    if level == 0:
        return
    for i in range(3):
        nest_tri(size / 2, level - 1)
        fd(size)
        rt(120)


def main():
    create_world(800, 600)
    set_speed(1000)

    setxy(-200, -150)
    rt(30)

    nest_tri(400, 7)

    pause()
    close_world()

easy_run(main)